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Below is an example of what the display will show if an external alarm has been activated,
where the alternate name has been set to "Fire alarm":
c) Latching mode
Latching mode allows the user to configure the latching mode for the external alarm:
▪
Latching: when the cause of the alarm is gone, the alarm remains active until
manual action is taken on the unit (RESET button pressed twice).
▪
Non-latching: when the cause of the alarm is gone, the alarm is automatically reset
and disappears.
Only the reset mode for the level 1 alarms can be configured. A level 2 alarm always needs
to be manually reset.
d) Siren addressing from the external alarm
Siren Addressing allows the user to define how the siren behaves when the external alarm is
triggered.
The following statuses are possible:
▪
Addressed: the buzzer and the output siren of the unit are activated when the
external alarm is activated.
▪
Not addressed: the buzzer and the output siren of the unit are not associated with
the status of the external alarm input.
Unaddressed Siren mode is useful when the actions taken on the relays must depend on
what is connected to the external alarm input, without this being interpreted as a gas alarm
(e.g., a fire-detection system).
e) Normal state of the external alarm
The external alarm, when enabled, is triggered by a change in status of its dedicated input
on the U•H1 unit. This configuration item specifies the status of the input when idle and, as a
result, the nature of the change in status that triggers the alarm.
The following statuses are possible:
▪
Normally Closed: the circuit connected to the input is closed when idle. Therefore,
the external alarm is activated when the circuit opens.
▪
Normally Open: the circuit connected to the input is open when idle. Therefore, the
external alarm is activated when the circuit closes.
DALEMANS sa/nv
Rue Jules Mélotte 27A
B-4350 Remicourt
+32 19 33 99 43
External alarm
Fire alarm
U•H1 Instruction Manual
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Certified
ISO9001 • VCA
www.dalemans.com
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